Meaning
A SigAlert is a Southern California traffic alert for a significant unplanned roadway incident or closure likely to cause substantial delay.
How it is used
California Highway Patrol history describes SigAlert as unique to Southern California and explains its origin in Los Angeles broadcast traffic reporting. CHP’s modern traffic system still exposes ‘What is a SIG Alert?’ alongside incident information.
Examples
- “There’s a SigAlert on the 405 after a crash.”
- “The SigAlert added almost an hour to the drive.”
Pronunciation
/ˈsɪɡ əˌlɜːrt/ · SIG-uh-lert
Tone and register
Neutral and practical in traffic reporting, but the word strongly implies disruption rather than an ordinary slowdown or scheduled construction project.
Visitor guidance
Treat SigAlert as a traffic-incident term, not a generic synonym for any congestion. Check current CHP or transportation information for the actual road, direction, closure, and expected impact.
Cultural context
SigAlert is one of Southern California’s most distinctive pieces of transport vocabulary. It grew from Los Angeles radio and police communication in the automobile era and became common enough to function beyond its original technical system as a recognizable local word.
Places represented
Open the reviewed place guide for each regional sense carried by this canonical entry.